[Android Studio] 갤러리에서 사진 가져오기

java

 

public Main camera extends AppCompatActivity {
    @SuppressLint("WrongThread")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);

        Button Button = (Button) findViewById(R.id.button);
        Button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(intent, 100);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 100 && resultCode == RESULT_OK && data != null) {
            Uri uri = data.getData();
            Bitmap bitmap = null;
            try {
                bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
            } catch (IOException e) {
                e.printStackTrace();
            }
            ImageView imageView = findViewById(R.id.imageView);
            imageView.setImageBitmap(bitmap);
        }
    }
}

 

xml

 

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:id="@+id/button"
        android:layout_width="92dp"
        android:layout_height="52dp"
        android:layout_marginStart="64dp"
        android:layout_marginTop="80dp"
        android:layout_marginEnd="21dp"/>

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="334dp"
        android:layout_height="449dp"
        android:layout_marginTop="96dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.494"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        tools:srcCompat="@tools:sample/avatars" />
</androidx.constraintlayout.widget.ConstraintLayout>